Dan
I have large Bennetts and they do exactly wot-was-said.
Lateral as well as individual control.
Would imagine even more important on an outboard boat as they ride much higher in the water and are therefore more vulnerable to windage.
Wouldn't be without them even on my diesel boat.
The port/starboard controls take a little getting used to as they operate the opposite sides tabs!
They have another excellent point in that they automatically retract to neutral when you switch the engine off.

I remember with our old 7.5 there was a real knack to a little flick of the wheel to keep you level as you came out of the water. i know all boats need this to some extent but was particularly necessary / rewarding with the 7.5.

Tubes out of the water and fairly narrow hull profile leads to plenty of lean. i also find that below 30 kts the boat feels like its working a little harder than it should, 30 kts and up and the hull is working well and fuel efficient improves.

IMO trim tabs are essential an Scorpions,we use big Kiekhaefer tabs to lift our heavy diesel boat,we trim down a bit to lift the stern to aid getting onto plane and are constantly adjusting to sea conditions.We have travelled in company with two other outboard Scorpions,both use Bennet tabs and swear by them

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It looks massive on the trailer,but tiny in a big sea!

I had Bennetts on an 8m inboard and they were essential for side to side stability. The Scorpion is narrow at the hind quarters hence the soft landings ! but the tabs would keep her very steady in wind or when running in a beam sea. The leg trim did all my bow adjustments.
Bennett seem to be pretty bulletproof and have been standard issue on most of the early Scorpions.